I have roland cube20x. I makes a loud buzz when plugged a cable on the input jack but it goes down when i touch the jack. Thanks

SOURCE: cable broke off in the input jack

I'm pretty sure t6hat the output jack is a sealed unit(contacts inside soldered to the surface of the circuit board. You may be able to grasp the center shaft of the plug with a thin jawed hemostat or really skinny long nosed pliers and pull it out that way. Make sure the amp is off and unplugged from the wall. If that doesn't work you will either have to get it removed at a shop or disassemble the amp to remove the circuit board and unsolder the jack and replace it or get the broken plug out of the jack once it is unsoldered. I've never had a Line6 apart yet but thats probably the type of jack they used. Thats because it has to be electronically isolated from the chassis. Hope this helps.

Andy Bell

• 313 Answers
• Posted on Jul 31, 2009

SOURCE: My Roland TD6 drum module output jacks have a bad hum and cut out

sounds like the solder on the connections has either dried and cracked or come loosse if the wrigling of cables works its the connections if you unpluig and remove the back panel look where the cable connect check the condition of the wiring at source point of contact you may need to resolder or reconnect..

SOURCE: Pedal inputs messed up? just buzzes, no sound!

Here is the schematic:http://www.godiksennet.com/images/sch/NS2.jpg Try testing or replacing Q1 first.

SOURCE: input jack is not grounded

Can you remove the pickups and get your hands inside? Since wires are soldered to the jack and connected to the controls etc, you may have to remove all of the electronics.

SOURCE: I have a very loud

If this ties to a keyboard, make sure the keyboard and this are BOTH plugged into the same receptacle. You should send a higher level from the keyboard (turn volume up to around 70% or so) and use less volume at the input gain of this amp. Use more at master volume if the amp has one if needed. If the hiss is there with NO input cables plugged in and input gains at 50%, that is objectionable, the amp probably needs servicing. Unused channel gains should be clear down.